rollinson



5. HOLLINSON & E. E. MOXHAM.

TOUL HOLDER. Y

' APPLICATION FILED NOV, I2' 1915- l ,l 93,426. Patented Ang. l, 1916.

zsnEETs-suszl. 1

@lun

E. ROLLNSON L E. E. MOXHAM.

` T001 HOLDER.

APPLICATION FILED NOV. 12. 1915. LMEQ@ Mmmm@ 1,1916.

2 SHEETS-SHEET'Z.

ERNEST EoLLINs'N ANDEDWAED ERNEST MOXHAM, oELoNDoN, ENGLAND, ASSIGN- oEs 'ro THE coATs MACHINE Toor.) COMPANY 1.1M1'rED,.oE LONDON, ENGLAND.-

'rooL-HoLDEE.

License.

Patented Aug. i, i916.

Application filed November 12, 1915. 'Serial No. 61,147.

To all whomt may concern Be it known that we, ERNEST ItoLLrNsoN and EDWARD' ERNEST MXHAM, both subjects of the King of Great Britain, residing at London; England,'hai1e invented certain, new and useful Improvements .in Tool.

.slidable member having a tool slide therein which is operated to move transversely to the movement of the tool holder when relative movement takes place between the tool holder andthe slidable member.

The invention will be more readily understood on reference to the accompanying drawings which illustrate two convenient forms by way of examplef In thesedrawings z-Figure lfis a longitudinal section of, a. tool holder according to y this -invention as arranged for internal undercutting--that is Vto say, for example, undercuttingv inside a tubular piece. Fig. 2 is an 'outside elevation. Fig. 3 is a section on theidine 3.-?) of Fig. 1. Fig. Llis a front elevation of the tool holder` shownfin Fig. 1. Fig. 5 is a detail View of thetool carrier. Fig. 6 is a sectional plan `of a modied form of tool holder having means for undercutting externally and internally at thesame time. The tools are shown in their extreme out position, that is before the cut has been Fig. 7 isa sectional elevation .at

ried by theslide restof the lathe or the like 'on which the tool holder is employed. The

i stem d of the stock is casing may be ot-smy suitable shape, but the form shown is preferable and has a hollow cylindrical stem and a cylindrical head b formin a cam and also a housing for `the tool sli e. This form of casing gives excellent guides for the sliding movement of the stock head c. The cam head b is hollow and there fits in it the "stock head c while the ided in the hollow stem of the casing.A `spring e tends to keep the stock in its extreme `outward posin tion, that is to say at one extreme limit of the relative sliding movement'of the casing and stock. In Fig. 1 the stock is shown in its extreme inner portion within the casing when thegroove fhas been undercut in the work g. The transverse vmovementof the tool h is effected by a relative sliding move: ment of the 'casing aover the-stock c. The stock c has a. nose piece i ony which 'a cap j, is fitted to suit the particular job in hand.

'The distance between the face of the cap j and the tool h is the exact distance in of the groove f from the outer edge of the piece of work g. Various caps can be employed for various jobs. When the 'cap comes up against the end of the piece gthe spring e iscompressed and the stock c and casing a move relatively. The amount of this relative movement may, be adjusted by means of a screw Air holes m and n permit the relative sliding movement' of the casing a and stock c to take place without hindrance.

The stock c is prevented from rotating within thefcasing by, a feather 0 slidable in :111 kdeway 'p in the interior of the cam The enlarged heady:3 .of the stock c is a toolslide g and over the recess and pinned toL the flattened ,face lc there is a coverh.

As'can be seen 4from Fig. 3 the tool slide g can movetransversel by an 'amount being guided between the flat face c2 and the stock cover piece. p. The'tool slide g lhas fixed in it a member such as apin s which projects intothe inclinedoslot ft of thel cam head b.

A suitable tool clamp or carrier'u isixedl im the ltool slide.. It desired. av` number of socket holes such as lwgn'ay be provided for the' toolclamp to enablerough adjustment for diiierent diameters of groove.

' A preferred formy of tool carrier is shown in the drawings and its construction will be more readily lunderstood from Fig. 5. The

carrier u has flattened yfaces u seen more clearly in Fig. 4 which fit between the lat faces ,The stem of the carrier lis passed throughjone or otherl of the -sockets w and a collar is threadedon to the end soas to bind the tool carrier u lfirmly to the slide. The tool carrier is hollow and a pin eis Vthreaded into the end to actas an .abutment for the stem h of the tool la By adjusting.

or varying the pin z the position of the tool may be ixed within shortlimits and when the tool is taken-out for grinding purposes the'abutment pine forms a fixed gage 'for its reinsertion to assure that the tool the tool i's set so that at the end of the relal .end of the work.

will be in the proper position to which it was originally set. A clamping sc'rew k2 holds the toolrigidly in-place.

It will be understood that `in operation tive movement of the casing and stock 0 the tool is projected laterally or transversely` to the relative sliding movement of the casing a and stock 0. This transverse movement starts when the cap y' engages on the Asthe stock and casing cannot rotaterelatively to 'each other the pin 's during the relative sliding movement The tool holder ofthe casing a. and stock 'o travels laterally or transversely 4as shown by the arrow 'v 1n Fig. 2, where the dust cap y has been removed to reveal the cam slot i. On Withdrawing the"` casing the spring e retains the stock in contact with the'work g until the tool la. is withdrawn from the groove f by the reversal of the process described above. By, employing tubular or cylindrical guides lfor the relative axial movement of the casing and sto'ckall chattering is prevented and a very steady and rigid transverse guide-is j .given for the tool slide. The flattened faces u and guide surfaces m also materially assist in producing this eect as will be readily appreciated. It has also been found that this form ofl holder is'stronger in practice than other types whicha're liable to break oli at the neck'.

l according to this invention may be ma'dei to cut grooves simultaneously on the outer and inner surfaces of a cylindricalpiece ofwork or on either of these surfaces separately. For `this pur? pose the'cam head 8 Fi`g. 6, is provided-with a slot 9 through which there passes an arm 10 attached to the tool slide 11.

tei-nal tool 12 and the external'tool 13 are,

as will bereadly understood, set inropposite -directions AIn Fig. 6 .the tools are set for rotation of the lwork in a clockwise direction. when looking at the front of the work.

transversely to the axis of the The tool 12cuts on the upper face seen in plan while vthe tool 13 cuts on the under face.

According tothe form shown in Figs. 6

.and 7 the stock 14 is prevented from rotating relatively tothe casing or cam head 8 by a 'guide falce 15 on ablock 16 fixed in the die head. In this form also the adjusting screw for the relatveaxial movement of the casing, a' cam head on' said casing, a stock.

guided to slide axially in the caslng, means forpreventing relative rotary movement between the stock and casing, an enlarged rethecam'h'ead of the casing, a tool slide movable transversely to the axis of the stock and casing within the recess in said enlarged head,l and a/pin'projecting from'said tool slide to engage with the camon the cam head.

' 2'. A tool holder having 'a cylindrical casing, a cam head on said casing, a stock Vguided to @slide axially in -the casing, a sprmg pressing the stock andcasmg apart,

means for adjustingthe amount of relative slidingV movement of the casing and stock, means for preventing relative 'rotaryjmovement between the stock and casing, an venlarged -recessed head `on'the stock -and lit ting within the cam head of the casing, a

l tcol slide movable transversely to the axis.

the stock and casing withinthe recess in said enlarged head, and a pin projecting from said tool' slide to engage with the cam on the cam head.

casing, a cam head -on said casing, a stock 'guided to slide axially in the casing, means for 'preventing relative rotary movement between fthe stock and casing, an enlarged recessed head on the stock and itting within the cam'head ofthe casing, said head being flattened at one side,"a tool slide movable stock and casing within thev recess in said enlarged cessed head on the stock and Atting within 3Q A tool 'holder having a cylindrical head, a cover piece over the attened portion of thehead and closingthe recess therein,

-and a pin projecting from said tool slide and through said cover piece to engage with the cam, on the casinghead.

4. A tool holder having a cylindrical casing, a cam head on Isaid casing, a stock guided'to slide axially in the casing, means for preventing relative rotary movement between the stock andl casing,"an enlarged recessed head onthe stock and fitting within vthe earn headvof the casing,

said head being attened at one side, a tool slide movable transversely to the axis of the stock and casing within the recess in` said enlarged head, alcover piece 'over the attened portion of the head and closing the recess therein,

In testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses.

ERNEST ROLLINSON. EDWARD ERNEST MOXHAM.

Signed by the said Ilirnesl: Rollinson and u Edward Ernest' Moxham in the-,presencef H. W. HAMPTON, l .f E. I. WOODYARD. 

